Job Description: Lead OR Sr. Design Engineer - HVBMS

Role Summary

The HVBMS Design Engineer will be responsible for architecting, developing, and validating high-voltage battery management systems (400V–1500V) for advanced energy storage and electrification platforms. This role demands mastery of circuit design, embedded control, functional safety, and system integration, with a robust emphasis on technical excellence and compliance.

Core Responsibilities
- System Architecture
- Define HVBMS topology, sensing, isolation, and protection strategies for large-format Li-ion packs.
- Develop redundancy and fail-safe mechanisms aligned with ISO 26262 ASIL-D requirements.
- Architect communication interfaces (CAN FD, Ethernet, ISO 15118) for seamless integration with vehicle/grid controllers.
- Hardware Design
- Design precision measurement circuits for voltage, current, and temperature sensing with high CMRR and isolation.
- Develop balancing circuits (active/passive) optimized for efficiency and thermal performance.
- Specify high-voltage contactors, pre-charge circuits,



and solid-state switching elements.
- Software & Algorithms
- Implement SOC, SOH, SOP estimation using Kalman filters, neural networks, or equivalent advanced methods.
- Develop real-time fault detection and diagnostic algorithms for over-voltage, over-current, thermal runaway, and isolation faults.
- Ensure compliance with cybersecurity standards (ISO/SAE 21434), and real-time OS constraints.
- Validation & Testing
- Conduct HIL/SIL simulations for algorithm robustness and edge-case scenarios.
- EMC/EMI compliance validation.
- Lead FMEA, FTA, and DFMEA processes for risk mitigation.
- Cross-disciplinary Integration
- Collaborate with mechanical engineers on pack enclosure, cooling, and vibration isolation.
- Interface with inverter and charger teams to ensure seamless HV system operation.
- Provide technical documentation for certification bodies and customer audits.

Required Qualifications
- Maste

📌 Sr. Design Engineer-HVBMS (Bengaluru)
🏢 Larsen and Toubro
📍 Bengaluru